Multi-rotational casting machine



July 2, 1963 A. FINELT MULTI-ROTATIONAL CASTING MACHINE Filed June 7, 1961 f 7 FIG. 9

a #NVENTER. BY 24 45 W United States Patent Ofi ice 3,095,621 Fatented July 2, 1963 3,095,621 MULTI-ROTATIONAL CASTING MACHINE Aron Finelt, 130-17 236th St., Laurelton, N.Y.

Filed June 7, 1961, Ser. No. 115,426 2 Claims. (Cl. 22-651) The present invention relates to an apparatus for metal casting intricate jewelry and similar relatively small objects. The apparatus also is adapted for casting wax patterns in rubber molds, and is particularly adapted for the lost wax method.

For the casting of jewelry, generally, in multi-cavity molds, a method commonly in use is to form a vulcanized rubber investure over the object or objects to be reproduced; to cut the investure and remove the objects; to inject wax into the rubber mold when held in a flask, thus forming a wax pattern; to cool the wax pattern; to invest the pattern with a fluid ceramic mixture and then set the mixture; to burn out the wax in an oven, thus forimng a mold for metals; and finally to cast the metal in the mold with or without centrifugal action thereon.

I have found that for certain casting metals, for example silver and brass horizontal centrifugal action is eflicient, whereas with other metals, such as platinum for example, better results are secured by vertical centrifugal motion of the mold. By means of the present apparatus simplification is afforded for both actions, selectively.

The invention will be described with reference to the accompanying drawings, in which:

FIG. 1 is a top plan view showing an embodiment of the invention.

FIG. 2 is a vertical section along the line 2-2, FIG. 1.

FIG. 3 is a view in front elevation with the flask and balance carrier, and rotational member, mounted vertically on its platform support.

Referring to the drawings, it will be seen that the apparatus comprises a platform 1 from which rises opposed bracket arms 2, adapted to receive between them a chambered body member 3 for supporting and driving the balanced flask carrier 10.

Within chambered body 3 is a drive shaft 5 which in the present instant is adapted to be driven by spring motor 6, FIG. 2, and which may be of any suitable construction. In the present embodiment the spring may be brought under tension by manual turning of the balanced flask carrier 10.

When chambered body 3 is carried by platform 1 in horizontal position, as in FIGS. 1 and 2, set screws may be applied to threaded openings (not shown) in bracket members 2 for holding pressure upon the enclosed walls of said chambered body member, or the latter may be held by said bracket members in any other suitable manner, as by a rod such as that shown at 7, FIG. 1, passed through an opening 8 in the said body member, the rod being threaded in one or both of bracket arms 2.

When body member 3 is placed in vertical position, the rod may be passed through an opening 9 therein, as shown in FIG. 3, the opening being indicated in FIG. 2. It will be seen that by releasing the body member 3 from its bracket support in the horizontal position of the body member shown in FIG. 2, movement of the body member 90 relatively to the bracket member and raising it vertically will bring it to the position of FIG. 3, ready for receiving the rod 7 through opening 9 of the body member.

The balanced flask carrier is an elongated arm 10 having a central hub 11, apertured to receive the enlarged end of shaft 5, preferably by frictional engagement, the top of the shaft being threaded to receive a pressure shaft head 12. The balanced member 14 is a weight carried by, and threaded on, a rod 15. At its base, weight 14 carries a depending slotted support, the slot receiving arm 10. By manipulation of nuts 16 and 17, the weight may be moved in either of two opposite directions on rod 15, whilst being supported by the slotted depending member 14*.

On the end of the flask carrier 10 of the balanced weight 14 is any suitable form of flask, such as that only schematically indicated at 17, FIGS. 1 and 2, and which includes a supply chamber 18 for the metal or wax to be forced into the mold held by the flask in the centrifugal rotation of the flask carrier.

From the above description, it will be seen that the invention provides a horizontal and/or vertical casting machine, which is adapted to cast metals requiring vertical centrifugal action as well as metals requiring horizontal centrifugal action, which is adapted to cast wax patterns in rubber molds, and which is versatile, easy to adjust to either position, and of simple construction.

When spring 6 is brought under tension by manual turning of the balanced flask carrier 10, the latter may be held in that position preparatory to power rotation, by sliding upward a retaining pin 19, FIGS. 1 and 3. This pin being brought into the rotational path of member 10, it will hold the latter until the pin is depressed.

Having described my invention, what I claim and desire to secure by Letters Patent is as follows:

1. A multi-rotational casting machine comprising an elongated hollow body member, a shaft extending transversely through said body member, power means in the body member for rotating said shaft, an end of the shaft extending through the body member, a supporting bracket having spaced arms adapted to embrace said body member at its base and also centrally thereof when the hollow body is positioned vertically or horizontally, an arm carried by said shaft exterior of the body member and releasable means for holding the arm firmly upon the shaft, means at one end of the last named arm for rigidly holding a mold containing flask and a supply chamber for a charge of wax or metal means carried by the opposite end of the last named arm and adapted to adjustably hold a counterweight movable longitudinal of the arm, and a counterweight held by said last named means.

2. A multi-rotational casting machine constructed in accordance with claim 1, in which opposed walls of the hollow body member are formed with two spaced apertures in each wall, a rod passing through opposed apertures in the arms of the bracket member and passing through opposed apertures in the two walls when the body member is in vertical position, the remaining apertures being adapted to receive said rod when the body memebr is in horizontal position between the spaced arms of the bracket.

References Cited in the file of this patent UNITED STATES PATENTS 

1. A MULTI-ROTATIONAL CASTING MACHINE COMPRISING AN ELONGATED HOLLOW BODY MEMBER, A SHAFT EXTENDING TRANSVERSELY THROUGH SAID BODY MEMBER, POWER MEANS IN THE BODY MEMBER FOR ROTATING SAID SHAFT, AN END OF THE SHAFT EXTENDING THROUGH THE BODY MEMBER, A SUPPORTING BRACKET HAVING SPACED ARMS ADAPTED TO EMBRACE SAID BODY MEMBER AT ITS BASE AND ALSO CENTRALLY THEREOF WHEN THE HOLLOW BODY IS POSITIONED VERTICALLY OR HORIZONTALLY, AN ARM CARRIED BY SAID SHAFT EXTERIOR OF THE BODY MEMBER AND RELEASABLE MEANS FOR HOLDING THE ARM FIRMLY UPON THE SHAFT MEANS AT ONE END OF THE LAST NAMED ARM FOR RIGIDLY HOLDING A MOLD CONTAINING FLASK AND A SUPPLY CHAMBER FOR A CHARGE OF WAX OR METAL MEANS CARRIED BY THE OPPOSITE END OF THE LAST NAMED ARM AND ADAPTED TO ADJUSTABLY HOLD A COUNTERWEIGHT MOVABLE LONGITUDINAL OF THE ARM AND A COUNTERWEIGHT HELD BY SAID LAST NAMED MEANS. 